These dudes put out some pretty sick stuff, military vehicles and other crazy stuff. I've seen their show on discovery (?) twice now, they're kinda bitches with each other, but....I still want one of their creations!
http://www.howeandhowetechnologies.com/
http://www.youtube.com/watch?v=6TLbviUMouI&hd=1
The 4-wheeler with treads looks like it would fuking kill you!